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PinPoint-E EDGE/GPRS - User Guide, version 2.32 29
Data Communication and Host Modes
Note: When using Public mode, connect the modem directly to the computer or
other end device. Using a hub or switch may prevent the modem from updating
the IP address of the end device when an IP address is received from the Your
Wireless Service Provider network.
In Wireless Ace, the Private mode settings are part of the PPP/Ethernet group.
FIGURE 6. Wireless Ace: Private Host Mode
• *HOSTPRIVMODE - Set to 1 to enable the explicit IP addresses.
• *HOSTPRIVIP - Set to the IP address you want the PinPoint-E to give to your device.
• *HOSTPEERIP - Set to the IP address you want for the PinPoint-E.
• *HOSTNETMASK - Set to the subnetmask (generally, 255.255.255.0).
Note: If you are using Private Mode (*HOSTPRIVMODE=1), you will need to
make sure that *HOSTPRIVIP and *HOSTPEERIP are on the same subnet. If the
subnet mask is 255.255.255.0, it is safe to use 192.168.x.y for each as long as the x
is the same number (0 in the example screen shot above) and the y is different (1
and 2 in the example) and between 0 and 254. The screenshot shows an example.
Internal DHCP Server
DHCP (Dynamic Host Configuration Protocol) has become a primary component of today’s net-
work environments. DHCP allows one server to automatically and dynamically allocate network
IP addresses and other network related settings (such as subnet masks, routers, etc.) to each com
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puter or device without the need to set up each specifically or keep track of what addresses have
already been used.
DHCP and Routing
DHCP is built on a client-server model. The client broadcasts on the local physical subnet to find
available DHCP servers (generally only one active per network). The server, when a request is
received, reserves an IP address for the requesting client and then sends an IP lease offer to the
client which contains the client's MAC address, followed by the IP address that the server is offer
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ing, the subnet mask, the lease duration, other IP configuration options, and the IP address of the
DHCP server making the offer. Upon receipt of an offer, the client configures its interface
accordingly.
255.255.255.0
192.168.0.2
192.168.0.1
1 - Use Private IP